Lutianchong Village, Hecheng District, Huaihua City, Hunan Province. Wenhua Bio-oil Factory in Hecheng District, Huaihua City, established in 2119, is located in Lutianchong Village, Hecheng District, Huaihua City, Hunan Province. It is an enterprise mainly engaged in oil, coal and other fuel processing industries. Biooil can be purchased in this factory, and its products are very effective and deeply loved by consumers.